Lathe-tool holder



LE ROY KRAMER AND A. BOOME.

Patented Oct. 25, 1921.

6 SHEETS-SHEET l- LE ROY KRAMER AND A. BOOME.

LATHE TOOL HOLDER.

APPLICATION FILED FEB.28, 191s.

Patented Oct. 25, 1921 6 SHEETS-SHEET 2.

LE ROY KRAMER AND A. BOOME.

LATHE TOOL HOLDER.

APPLICATION FILED FEB. 28. 1918.

1,394,628. Patented Oct. 25, 1921,

6 SHEETS-SHEET 3.

LE- ROY KRAMER AND A. BOOM'E.

LATHE TOOL HOLDERI APPLICATION FILED FEBJZB, 1918.

1,394,628, I Patented Oct. 25, 1921.

5 SHEETSSHEET 4.

LE ROY KRAMER AND A. BOOME.

LATHE TOOL HOLDER.

APPLICATJON FILED FEB. 28, 191B.

Patented Oct. 25 1921.

6 SHEETS-SHEET 5- zumsa' LE ROY KRAMER AND A. BOOME.

LATHE TOOL HOLDER.

APPLICATION FILED FEB. 28, 1918- 1,394,628. Patented Oct. 25, 1921.

6 SHEETS-SHEET Q.

LE ROY KRAMER AND ALEXANDER BOOME,

OF CHICAGO, ILLINOIS.

LATHE-TOOL HOLDER.

To all whom it may concern, 1

Be it known that we, Ln RoY KRAMER and AL XANDER BooME citizens of the United States, residing at hicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lathe-Tool Holders, of which the following is a specification.

The'present invention relates to tool holders for lathes, and is particularly concerned with holders employed withlathes for turning car axles.

The main and primary object of the invention is the provision of a tool holder which is adapted to receive a plurality of toolsand properly such rigidity as to withstand the heavy pressure to which, they are subjected during the operation of roughing the axles, thereby insuring stability to the holder and maintenanceof the tools in their operative positions.

Furthermore, the invention seeks to provide a tool holder wherein is incorporated novel and eflicient means for setting the tools to proper diameters of cut, the construction including provision .for adjustment and interchange of the gaging instrumentalities to permit a ready positioning thereof in accordance with the different diameters to be turned.

The invention also contemplates the provision of means in the form of a novel diameter stop, designed to limit the movement of the tools as they are presented to the work, and thus insure the accurate positioning of the tools for action on the work 1n accordance withthe predetermined dianr eter to be imparted thereto.

With these general objects in view, and others which will appear as the nature of the improvements is better understood, the invention consists substantially in the novel construction, combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and finally pointedout in the appended claims. T he embodiment of the invention which is delineated herein is to be taken only as an illustrative one, so that the invention is not to be understood as limited to such specific form.

Specification of Letters Patent.

Application filed February 28, 1918.

support the same with Patented Oct. 25, 1921. Serial No. 219,551. I

In the drawings Figure l is a side elevation of a tool holder constructed in accordance with the present invention, parts being slightly broken away; A

Fig. 2 is a medial longitudinal sectional view thereof;

Fig. 3 is a top plan view of the tool block, and so much of the cross slide as is inimmediate proximity thereto;

Fig. 4 is an end view of the tool block, cross slide and carriage, the latter being slightly broken away; 7

F 5 is a top plan View of the carriage; 1g. '6 is an end elevation of the tool-setting gage as applied to the head of the tool block;

Fig. 7 is a top plan view of the means for1 effecting horizontal adjustment of the too Figs. 8 and 9 are end and side elevations, respectively, of the construction illustrated in Fig. 7.

Fig. 10 is a top plan View of an alternative form of tool-setting gage;

Figs. 11 and 12 are end and side eleva tions, respectively, of the construction illustrated in Fig. 10.

Referring now in detail to the accompanying drawings, the numeral 10 designates the carriage of a metal turning lathe, which carriage partakes generally of the construction of carriages usually found in such machines. In order to adapt the same, however, to the peculiar needs which arise in connection with the turning of car axlesit is necessary to impart to the carriage a high degree of rigidit and strength, thereby to afford proper stability to the carriage and support for the tools. To this end, the carriage 10 is provided with-a pair of parallel laterally projecting webs 11 and 12, arranged, respectively, at the front and rear ends of the carriage 10. said webs being provided with guide grooves 13 and 14,, respectively, the sides of which are arranged in divergent relation. iV ear strips 15 and 16, respectively, are applied to the sides of said grooves 13 and 14, and by referring to Fig. 5 it will be observed that the guide grooves 13 and 1d extend throughout the entire width of the carriage 10 and receive slideinner edges of said flanges.

ways 17 carried by the bed of the machine and on which the wear strips 15 and 16 work. One of these slideways is illustrated in dotted lines in Fig. 1, it being unnecessary to illustrate further parts of the machine bed.

At the underside of the body 10 is a depending apron 18 for supporting the feed gears.

The upper side of the bed 10 is provided with longitudinally-extending marginal upwardly-directed flanges 19 and 20 to which are applied retaining strips 21 and 22, respectively, said strips 21 and 22 belng of greater width than the width of the flanges 19 and 20, and thereby overhanging the i This provides guides for the cross slide, to be hereinafter described, and thus insures proper movement of the slide as it traverses the carriage 10. The strip 21 is held in position on the flange 19 by a plurality of cap screws 23, which screws are threaded into said flange 19, while the strip 22 is likewise held in position on the flange 20 by a plurality of cap screws 24. These screws 24 take into the body of the carriage 10 and pass through slots formed in a gib 26 which is arranged at the inner side of the flange 20 and interposed between the retaining strip 22 and the body of the carriage 10. The gib 26 may be adjusted inwardly by means of a plurality of screws 27, or their equivalents, to compensate for any wear which may arise in connection with the movement of the cross slide to be now referred to.

The numeral 28 designates the hereinbefore mentioned cross slide having at opposite sides of its base portion outstanding flanges 29 which fit beneath the retaining strips 21 and 22, the cross slide being thus held upon the carriage 10 but adapted to freely move in the guides formed beneath the retaining strips 21 and 22 and between the flanges 19 and 20. Extending lengthwise of the slide is a bore 30 which receives an adjusting screw 31. At a point intermediate the ends of the bore 30 the latter is enlarged to provide a downwardly opening polygonal pocket or recess 32,which pocket or recess 32 receives a polygonal nut 33 the bore of which is screw-threaded to fit the threads of the adjusting screw 31. It will thus be apparent that the cross slide may he moved in either direction in the carriage 10 upon proper rotation of the screw The forward end of the adjusting screw 31 is rotatably mounted within a head block or bracket 34 suitably bolted to the forward end of the carriage 10, and said adjusting screw is held against longitudinal movement 'in' said block 34 through the medium of a fixed collar 35, which is carried by the screw 31 and arranged at the inner side of the block 34. and a hand wheel 36, of standard flattened, and surrounded by a plurality of guide strips 39 which are suitably secured to said'support 38. A socket or pocket is thus provided at the support 38 for receiv ing a tool-supporting block 40. The pocket formed by the guide strips 39 is substantially rectangular in form, and said toolsupporting block 40 is correspondingly shaped and of such dimensions as to snugly fit within the space between the guide strips 39. Thus it will be seen that when the toolsupporting blocks 40 are placed upon the support 38 and fitted between the guide strips 39, the same will be afforded a firm and stable mounting upon the cross slide 28.

The block 40 is provided with a plurality, preferably two, of tool-receiving openings 41 which extend lengthwise of the block 40, the bottom of each opening 41 being provided with a wear strip 42 suitably secured therein, and preferably case hardened to afford the greatest resistance to wear. Upon the wear strip 42 the tools 43 are mounted, as clearly illustrated in Fig. 4, each of said tools being properly held within the openings 41 by means of a plurality of set screws 44. If it be desired to raise the tools 43 above the wear strip 42 the same may be accomplished by the interposition of shims or spacing strips 45.

It is, of course, necessary that when the block 40 is placed upon the tool slide 28 the same shall be held in time position on the support 38. This is accomplished by two instnnnentalities, to wit; a centering pin 46 and an anchoring stud 47. The centering pm 46 enters a threaded opening 48 which is formed in the support 38 at the rear end thereof, said pin'46'being received by an opening 49 formed at the rear end of the block 40 and adapted to register with the opening 48. When this registration has been eflected the centering pin 46 may be passed through the opening 49 and'screwed into the opening 48, thus serving to hold the tool sup-- porting block 40 in proper position within the space between the strips 39. The relation of the centering pin 46 is, obviously, a removable one with respect to the cross slide 28 in order to permit removal of the tool supporting block '40 when such is desired. The anchoring post 47 rises upwardly from the forward end of the support 38 and is screw threaded at its upper end for receiving afastening nut 50. At the forward end of theblock 4.0 is

formed a U-shapedsocket 51 which receives the anchoring post 47 when the block 40 is placed upon the cross slide 28. ,When so assembled the upper end of the anchoring post extends abovethe top of the tool supporting block 40, the diameter of the fastening nut 50 being suiiicient to over lap theedges of the socket 51, thus permitting, when the fastening nut 50 is properly operated, a binding engagement between the fastening nut and the tool supporting block, and thereby locking the latter on the support 38. 7

It has been stated that one of the objects of the present invention is to provide a tool holder in which is incorporated novel and eflicient means for setting the tools to proper diameters of cut. Such setting means are clearly disclosed in Figs. 1, 2, 3, and 6, and by referring to these figures it will be noted that a U-shaped gage is employed for this purpose. This gage includes a supporting bar 52 at the ends of which are arranged parallel attaching arms 53, the free end of each ofsaid arms'53 beingv provided with a horizontal notch 54, and also having a vertical notch formed inits under edge. These notches 54 and 55 are adapted to receive outstanding lugs 56 and 57, respectively, arranged in different planes at the upper portions of the ends of the block 40. When the notches 54 and .55 are engaged with the lugs 56 and 57 the attaching tool supporting block 40,- and said lugs 56 form pivots about which the gage may swing, while the lugs 57 support the gage in horizontal position, and thus limit the downward movement-thereof when the same is swung about the lugs 56,, At the underside of the supporting bar 52 is arranged a templet 58, that edge of the templet 58 which is nearest to the tool supporting block 40 be ing shaped as of the diameters of cutwhich it is desired to impart by the tools to the axle. Thus, the templet 58 will be so shaped and dimensioned that the diameters of cut desired to be imparted'to the journal, wheel base, etc., of the axle will be attained by positioning the tools in relation to the templet in the manner hereinafter described. The templet 58 is connected to the supporting bar 52 by a pluralit of bolts 59, or their equivalent, which are adjustment maybe imparted to the templet 58, should it-be necessary to adjust the same in relation to said bar 52. In this connection it should be observed that the U-shaped gage, through the'medium of the lugs 56 and 57 holds the templet 58 at the proper elevationwith respect to the cutting edges of the tools 43 so that these tools, when adjusted, may be properly presented to the axle in the proper relation to the center line thereof. This will be understood from Figs.

arms 53 embrace the seated in slots formed in said bar 52, as thus'a degree of.

1 and 2, in which views the position of the axle is disclosed by the dotted lines.

By fastening the templet 58 to the supporting bar 52 through the medium of the bolts 59 and 60 it will be seen that the templets may not only be adjusted but there may be an interchange thereof.

It has also been stated that the invention further contemplates the provision of means designed to limit the movement of the tools as they are presented to the work and which will insure the accurate positioning of the tools in accordance with the predetermined diameter to be imparted to the work. The

means by which this is accomplished are I illustrated in Figs. 1, 3. 4. and inch means comprise a stop block 61 which is suitably connected to each side of the carriage 10 at predetermined points. so as to be held in fixed relation to the movement of the cross slide 28. Each of these stop blocks is provided with an outstanding foot 62 to 'which is connected, as by a bolt 6?). or its equivalent, a stop proper er. The stop proper G l has a nose 65 which fits within a groove 66 arranged in the contiguous portion of the carriage l0. Mounted at each side of the forward end of the slide 28 is a bracket 6'7 in which a set screw 68 is threadably mounted, and thus capable of adjustment within said bracket 67, and said set screw 68 may be held in this position oi adjustment by means of a locking nut 69 associated therewith. It will be understood that the screw 68 is so adjusted in the supporting bracket 67 that when the end oi said screw contacts with the stop proper 6% the cutting edges of the tools 43 will have approached the axle to the proper position for insuring the diameter of cut to be imparted to the axle. WVhen these diameters vary in accordance with the ditl'erent diameters oi axles, the screws 68 will be set from time to time so as to provide for the presentation ot' the cutters in the manner above referred to.

The stop proper 6% has a loose pivotal connection with the bolt 63, and it ocoa sion demands the same may be swung thereon so as to remove the nose 65' ot' the stop proper from the groove 66. When the stop proper is swung in this manner it is removed tromthe path of forward .movement of the set screw 68, so that the i I'll) yoke each being provided with an elongated slot 71. which is open atone of its ends, said slot receiving a fixed stud 72 which projects outwardly from the end 01'? the block 40 adjacent to the arm, and each of said slots also receives a screw threaded stud or pin 73 having mounted thereon; a clamping nut T l which is adapted to embrace and bear against the outer side of each of the arms of the yoke. ll' hile the studs '72 will limit the movement of the yoke 70 toward the block ll) it is apparent that the outward movement, or movement away from the block, is limited. only by the length oi? the slot 71, and when the proper positioning of the yoke with respect to the block 5 0 has been attained. the nuts 74 are tightened. thereby holding the yoke in such position of adjustment. 7

A plurality oi guide pins 75 is mounted in the voke 70 as b screw threadin the free ends of said pins being received by a plurality of sockets 76 formed in the block to said pins being capable of free movement within said sockets 76 so as to conform to the movement of the yoke when the same is adjusted in relation to the block. donut ed in the yoke 70, one for each of the cutters 43, is a plurality of adjusting screws 7?. the inner ends of which are provided with reduced necks 78' terminating in enlarged heads 79. The headsTi) fit within vertical channels 80 formed in the ends of the tools which are contiguous to the screws 77, and each of said tools 43 is also provided with a vertically disposedslot 81 jwhich communicates with the channel 80 of that cutter, the shank (8 of the screw 77 which engages the cutter being received by said slot 81. This slot is also provided with an enlarged opening 82 through which the head '79 is introduced to and removed from the channel 80. The manner oi engagement of the screws '77 with their respective tools &3 is clearly illustrated in Fig. '7. and whenso engaged it is obvious that as the screws 77 are adjusted the several tools may be moved forwardly or rearwardly within the supporting lock 4h). It will. of course, be understood that this adjustment is effected only when the set screws l4: have been loosened. and when such adjustment has been made the screws it Tl are again tightened to hold the tools in position.

[is an alternative form of tool setting gage, the construction illustrated in Figs. 10, 11 and 12 may be employed. This includes abase plate 83 of suflicient dimensions to accommodate one of the tool supporting blocks 40. The plate 83 at its un der face is provided with suitable supports 84, and at its upper face is providedwith guide strips 85 which form a rectangular nclosure for the reception of the tool supporting block. :At points opposite to the rectangular space reierredto is provided a plurality of vertically extendingpedestals" 86 which support a templet- 87 secured to said pedestals 86through the medium of a pluralityoi cap screws 88 or their equiva- I lent. At a point approximately the center of the plate 83, and in proximity to the templet-supporting. pedestals 86, is an upstanding lug 89, which corresponds to the centering pin 46, shown in the othenfigures of the drawing. This lug 89 is designed to enter the opening 49 of the tool-supporting block at) when the latter is positioned upon the plate 83. The numeral 90 designates the anchoring stud which is formed of up- :er and lower members, hingedly connected. as at 91. the lower member being fixedly connected-to the plate 83,..while the upper member may be swung. upon the lower member to andfrom engaging positions with the tool-supporting block when the latter is plared' upon the device. In the upper end of the upper hinged member of the stud 90 is a tapered slot 92 which receives a wedge 93, and surrounding the stud 90 is a washer 9 adapted to embrace the upper face of the tool-supporting block 40 and span the U-shaped socket 51 thereof. The dotted lines in Fig. 10 illustrate the toolsupportingblock in position on the gage. removing the wedge 93 and the washer Slel from the anchoring stud 90 the tool-supwhile the U-shaped socket 51 receives thestud 90. If the upper member of the stud 90 be then swung into alin ement with the lower member thereof, and the washer 94: positioned on thestud 90 so as to span the upper end of the socket '51, the insertion of the wedge 93 in the slot 92 will force the washer 94: into tight engagement with the upper end of the block 40, and thusanchor the latter onto the plate 83. The several tools may nowv be adjusted to the desired diameters of cut by presenting the same to the different portions of the templet 87, and when the tools are thus assembled and positioned the block 40' and the tools con tained therein may bebodily removed from the gage and positioned on the cross slide 28 without further setting of the tools. e

lVith the templet 58 positioned by the attaching arms 53 upon the tool-supporting block 40 as illustrated in Figs. 1, 2 and 6, it is evident that the several tools 43 can be set to the desired diameters of cut by presenting their cutting edges to the shaped edge of the templet '58, and when this has been done the set screws 44 are tightened to hold the respective tools in such adjusted position. The setting gage is now removed,

of the and by proper manipulation of the hand wheel the cross slide 28 is advanced to the work, and the tools presented to the axle for the roughing operation. The set screw (58 of the diameter stop having been properly adjusted, the forward movement of the cross slide 28 is'arrested by contact screw 68 with the stop proper 64. The longitudinal feed .ofthe lathe is now thrown in, and when the required length of cut has been made such feed is discontinued by the usual mechanism of the lathe. Obviously, therefore, when the advance movement .of the tools to the work is Checked by the diameter stop hereinbefore described the tools are in proper position for obtaining cut of the axle to the predetermined diameters; furthermore, it will also be evident that the tools are properly supported with such rigidity as to withstand the heavy pressure to which they are subjected during the operation of roughing the axle and maintained in their operative positions with the required stability which should characterize a. tool holder subjected to these conditions.

We claim:

1. In a lathe tool holder, the combination with a cross slide, of a gang-tool holder associated therewith, means associated with said gang-tool holder for positioning the tools therein in predetermined relation to the line of cut and .to the center line of the work when presented to the work, and means for arresting movement of the tool-holder at a predetermined point in the advance thereof with respect to the workwhereby to effect in cooperation with said tool-positioning means a correctly proportioned final.

shaping of that portion of the work thus cut.

2. In a lathe tool holder, the combination with a cross slide, of a gang-tool-holder associated therewith. displacea'ble means associated with said gang tool holder for positioning the tools therein in predetermined relation to the line of cut and to the center line of the work when presented to the work,

and means for arresting movement of the' tool holder at a predetermined point in the advance thereof with respect to the work whereby to effect in cooperation with said tool-positioning means a correctly proportioned final shaping of that portion of the work thus cut.

3. In a lathe tool holder, the 'combination with a cross slide, of a gang-tool holder associated therewith, means associated with said gang-tool holder for positionlng the.

tools therein in predetermined relation to the line of cut and to the center line of the work when. presented to the work, and variable means for arresting movement of the tool holder at a predetermined point in the advance thereof with respect to the work whereby to effect in cooperation with said tool-positioning means a correctly proportioned final shaping of that portion of the work thus cut.

a. In a lathe tool holder, the combination with a carriage, of a cross slide mounted thereon and movable withrespect thereto,

' a gang-tool holder associated with said slide, means associated with said gang-tool holder for positioning the tools therein in predetermined relation to the line of cut and to the center line of the work when presented to the work, a stop associated with said carriage, and means associated with said cross slide and cooperating with said stop for arresting movement of the tool holder at a associated with said gang-tool holder for positioning the tools therein in predetermined relation to the line of cut and to the centei line of the work when presented to the work, a fixed stop associated with said carriage. and variable means associated with said cross slide and cooperating with said fixed stop for arresting movement of the tool holder at a predetermined point in the ad vancethereof with respect to the work whereby to effect in cooperation with said tool-positioning means a correctly proportioned final shaping of that portion of the work thus cut.

6. In a lathe tool holder, the combination with a cross slide, of a gang-tool holder associated therewith, and means associated with said gang-tool holder .for positioning the tools therein in predetermined relation to the line of cut and to the center line of the workwhen presented to the work. i

' 7 In a lathe tool holder, the combination with a cross slide, of a gang-tool holder associated therewith, and a displaceable gage associated with said gang-tool holder for positioning the tools therein in predetermined relation to the line of cut and to the center line of the work when presented to the work.

8. In a lathe tool holder, the combination with a cross slide, of a gang-tool holder as sociated therewith, a templet for positioning the tools in said holder in predetermined relation to the line of cut when presented to the work, a support for said templet, and means for connecting said templet and its support to said gang-tool holder.

9. In a lathe tool holder, the combination with a cross slide, of a gang-tool holder associated therewith, a templet for positioning the tools in said gang-tool holder in predetermined relation to the line of cut when presented to the work, a support for said templet, attaching arms connected to said support and means for detachably connecting said arms with said gang-tool holder.

10. A setting gage of the class described, comprising a supporting base, a templet carried by said base, and means for anchoring the tool holder and its associated tools upon said base and in fixed relation to said templet.

11. A setting gage of the class described, comprising a supporting base, a templet associated with sai'dbase,means foroentering a tool holder and its associated tools on said base and in respect to said templet, and means for anchoring the tool holder to said base when so centered.

12. A setting gage of the class described, comprising a supporting base, atemplet associated with said base, centering means carried by said base for centering a tool holder and its associated tools with respect to said templet, and an anchoring stud carried by said base and cooperating with the tool holder for anchoring the latter to said base when centered with respect thereto.

13. In a lathe tool holder, the combination with a cross slide, of a gang tool holder associated therewith, a support associated with said gang tool holder and positioned thereon above the tools thereof, a templet carried by said support for positioning the tools in predetermined relation to the line of cut and to the center line of the work when presented to the work, andmeans for adjustably mounting said templet on said support.

14. In a lathe tool holder, the combination with a cross slide, of a gang tool holder associated therewith, a support associated with said gang tool holder and including a U-shaped frame, means for -detachably mounting said support on said tool holder above the tools thereof, a templet carried by said support for positioning the tools in predetermined relation to the line of cut' and to the center line of the work when presented to the work, and means for adjustably mounting said templet on said support.

15. In a lathe toolholder, the combination with a cross slide, of a gang tool holder associated therewith, a U-shaped support associated with said gang tool holder and positioned thereon above the tools thereof, said support having its sides notched, studs carried by the gang tool holder and with which the notchesor" said support are engaged to detachably hold said supports on said gang toolholder, and a templet carried by said support for positioning the tools in predetermined relation to the line of cut and to the center line of the work when presented to the work.

16. In a lathe tool holder, the combination with a cross slide,of a gang tool holder associated therewith and provided at opposite sides with outstanding studs, a U-shaped tion with a cross slide, ofa gang-tool holder associated therewith, and a removable gage associated with said gang-tool holder for positioning the tools therein in predetermined relation to the line of cut and to the center line of the work when presentedto the work. V i

In testimony whereof we have hereunto signed 'ournames in the presence of two subscribing witnesses. LE ROY KRAMER.

V ALEXANDER BOOME.

- Witnesses:

RAOINE THOMPSON, Ron'r. A,;.MoNsoN. 

